Graham
Graham (GP3)
GRAHAM is a heterogeneous cluster, suitable for a variety of workloads, and located at the University of Waterloo. It is named after Wes Graham, the first director of the Computing Centre at Waterloo. It was previously known as "GP3" and is still identified as such in the 2017 RAC documentation.
System evaluation is not yet completed as of November 2016. Anticipated specifications, based on Waterloo's RFP and bids received, include the following. This information is NOT GUARANTEED and might not be complete. It is provided for planning purposes.
The parallel filesystem, interconnects and external persistent storage (NDC-Waterloo) will be the same as Cedar's. There is a slightly different mix of compute nodes.
Attached Storage System
| $HOME |
Standard home directory |
| $SCRATCH Parallel High-performance filesystem |
Approximately 3PB usable capacity for temporary ( |
| $PROJECT External persistent storage |
Provided by the NDC. |
High Performance Interconnect
A low-latency high-performance fabric connecting all nodes and temporary storage.
The design of Graham is to support multiple simultaneous parallel jobs of up to 1024 cores in a fully non-blocking manner.
Node types and characteristics
| "Base" compute nodes | 800 nodes | 16 cores/socket, 2 sockets/node, 128 GB of memory. |
| "Bigmem512" nodes | 24 nodes | 16 cores/socket, 2 sockets/node, 512 GB of memory. |
| "Bigmem3000" nodes | 3 nodes | 16 cores/socket, 4 sockets/node, 3 TB of memory. |
| "GPU" nodes | 160 nodes | 16 cores/socket, 2 sockets/node, 128 GB of memory, 2 NVIDIA P100 GPUs. |
| "Large" nodes | 56 nodes | 16 cores/socket, 2 sockets/node, 256 GB of memory. |
All of the above nodes will have approximately 1TB of local (on-node) storage provided by SSD drives available in /tmp.
The delivery and installation schedule is not yet confirmed.